JPS62276685A - Optical type paper money discriminator - Google Patents
Optical type paper money discriminatorInfo
- Publication number
- JPS62276685A JPS62276685A JP61119183A JP11918386A JPS62276685A JP S62276685 A JPS62276685 A JP S62276685A JP 61119183 A JP61119183 A JP 61119183A JP 11918386 A JP11918386 A JP 11918386A JP S62276685 A JPS62276685 A JP S62276685A
- Authority
- JP
- Japan
- Prior art keywords
- banknote
- output
- receiving element
- light
- reflection light
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000003287 optical effect Effects 0.000 title claims description 21
- 238000001514 detection method Methods 0.000 claims description 17
- 238000012937 correction Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 8
- 238000004364 calculation method Methods 0.000 claims description 5
- 238000005259 measurement Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 5
- 238000012850 discrimination method Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 2
- 238000010200 validation analysis Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Landscapes
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
- Inspection Of Paper Currency And Valuable Securities (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
３、発明の詳細な説明
産業上の利用分野
この発明は、紙幣鑑別装置、特に印刷状態の識別によっ
て紙幣の真偽判定を行う紙幣鑑別装置に関連する。DETAILED DESCRIPTION OF THE INVENTION 3. Detailed Description of the Invention Industrial Application Field The present invention relates to a banknote validating device, and particularly to a banknote validating device that determines the authenticity of banknotes by identifying the printing state.
従来の技術
紙幣鑑別装置は、自動販売機、券売機、自動預金装置等
種々の分野で使用されている。紙幣鑑別の基本的技術は
、主として光学式鑑別法と磁気式鑑別法に大別される。BACKGROUND OF THE INVENTION Conventional banknote validating devices are used in various fields such as automatic vending machines, ticket vending machines, and automatic deposit machines. The basic techniques for banknote identification are mainly divided into optical identification methods and magnetic identification methods.
光学式鑑別法では、ホトカブラを使用して紙幣に対する
反射光斌又は透過光量を測定し、紙幣の寸法及び印刷状
態を電気信号に変換して紙幣の真偽を判定する。また、
磁気式鑑別法では、磁気センサを使用して紙幣の磁気的
特性を測定し真偽判定を行う。必要に応じて光学式鑑別
法と磁気式鑑別法を併用して厳重な紙幣鑑別を行う場合
もある。In the optical discrimination method, a photocoupler is used to measure the amount of reflected light or transmitted light on a banknote, and the dimensions and printing conditions of the banknote are converted into electrical signals to determine the authenticity of the banknote. Also,
In the magnetic identification method, a magnetic sensor is used to measure the magnetic properties of banknotes to determine authenticity. If necessary, strict banknote identification may be performed using both optical and magnetic identification methods.
発明が解′ しようとする間近鳳
ところで、上記従来の光学式鑑別法を利用する！！別装
置では、種々の変造紙幣に対し充分に鑑別を行うことが
できない。即ち、複写技術が高度に発達した今日、紙幣
を鮮明に複写することができ。By the way, when the invention is about to be solved, the conventional optical discrimination method mentioned above is used! ! With a separate device, it is not possible to sufficiently identify various types of altered banknotes. In other words, in today's highly developed copying technology, banknotes can be clearly copied.
複写物を変造紙幣として利用することは、極めて容易で
ある反面、複写機で複写された偽紙幣を反射光を利用し
て光学式に真紙幣と識別することは困難である。また、
偽紙幣に紙を張り合わせて透過光量を調整することも容
易である。更に、偽紙幣に磁気的特性を付与することも
容易である。従って、従来の磁気式鑑別法を利用する鑑
別装置でも、充分に紙幣の鑑別を行うことができない。Although it is extremely easy to use a copy as a counterfeit banknote, it is difficult to optically identify a fake banknote copied by a copying machine from a genuine banknote using reflected light. Also,
It is also easy to adjust the amount of transmitted light by attaching paper to the counterfeit banknote. Furthermore, it is easy to impart magnetic properties to counterfeit banknotes. Therefore, even a discrimination device using the conventional magnetic discrimination method cannot sufficiently discriminate banknotes.
上記従来の方法で紙幣鑑別を高精度で行う場合には、紙
幣鑑別装置は、非常に複雑かつ高価となり、特に、紙幣
表面が汚れているとき、判別機能が著しく低下する。紙
幣鑑別装置に偽紙幣を不正に使用する犯罪は、報道機関
を通じて報知されろようにしばしば発生しており、新し
い鑑別方式による紙幣鑑別装置を開発することによって
この種の犯罪を防止することは、現在の社会的重要課題
でもある。When performing banknote discrimination with high precision using the above-mentioned conventional method, the banknote validation device becomes extremely complicated and expensive, and particularly when the banknote surface is dirty, the discrimination function is significantly degraded. Crimes involving the unauthorized use of counterfeit banknotes in bill validators occur frequently, as reported by the media, and it is possible to prevent this type of crime by developing a banknote validator using a new validation method. It is also an important social issue today.
この発明は、上記欠点を解消し、印刷状態の識別により
紙幣の真偽を判定することができる紙幣鑑別袋；４を提
供することを目的とする。An object of the present invention is to eliminate the above-mentioned drawbacks and provide a banknote discrimination bag; 4 that can determine the authenticity of banknotes by identifying the printing state.
血解決するための手段
この発明の光学式紙幣鑑別装置は、発光部と、この発光
部から照射されかつ紙幣の表面で反射する光を受光して
電気４ａ号に変換する受光部と、この受光部の出力を処
理して紙幣の真偽判定出力を発生する判定回路とを有す
る光学旬紙幣鑑別装置において、前記発光部の発光素子
から紙幣の表面に照射する光の照射角度と等しい受光角
度で配置されかつ紙幣の表面で整反射した光を受光する
面反射受光素子と、前記照射角度とは異なる受光角度で
配置されろと共に前記発光素子から照射されかつ前記紙
幣の表面で乱反射した光を受光する乱反射受光素子とを
前記受光部に設け、前記面反射受光素子から得られる電
気信号と乱反射受光素子から得られる電気＜８号とを演
算する演算手段と、この演算手段の出力を予め記憶され
た基準範囲と比較して真偽判定出力を発生する比較手段
とを前記判定回路に設ける。The optical banknote validating device of the present invention includes a light emitting section, a light receiving section that receives light emitted from the light emitting section and reflected on the surface of the banknote, and converts it into electric No. 4a, and In the optical banknote validating device, the optical banknote validating device has a determination circuit that processes the output of the light emitting unit and generates an output for determining the authenticity of the banknote. a surface-reflecting light-receiving element arranged at a light-receiving angle different from the irradiation angle to receive light uniformly reflected on the surface of the banknote; A diffused reflection light-receiving element is provided in the light-receiving section, a calculation means for calculating an electric signal obtained from the surface reflection light-reception element and an electricity<8 obtained from the diffused reflection light-reception element, and an output of this calculation means is stored in advance. The determination circuit is provided with a comparison means for generating a truth/false determination output by comparing with the reference range determined.
■堆
面反射受光素子から得られる電気Ｊｆｊ号と乱反射受光
素子から得られる電気信号との比較により。(2) Comparison of the electric signal obtained from the surface reflection light receiving element and the electric signal obtained from the diffuse reflection light receiving element.
紙幣表面の汚損に影響されずに、紙幣本来の印刷状態を
電気信号に変換して真偽判定が行われる。Authenticity determination is performed by converting the original printing state of a banknote into an electrical signal without being affected by dirt on the banknote surface.
尖五貫
以下、この発明の実施例を第１図ないし第７７について
説明する。Embodiments of the present invention will be described below with reference to FIGS. 1 to 77.
第１図は、この発明による紙幣鑑別装置の基本的回路図
と示す。発光部１］４の光源駆動回路１２に接続された
発光素子１３は１紙幣１４の表面上５に向かって光を照
射する。発光索子１３から照射された光のうち、表面１
５で整反射する光は、受光部１６の面反射受光素子１７
で受光され、電気４８号に変換される。紙幣１４の表面
１５で乱反射する光は、受光部１６の乱反射受光素子１
８で受光される。発光素子１３、面反射受光索子１７及
び乱反射受光素子１８の配置状態は、第２図に示される
。即ち、発光素子１３は、紙幣１４の表面１５に対し角
度θで固定されるのに対し、面反射受光素子１７は、同
一の角度θで固定されるが。FIG. 1 shows a basic circuit diagram of a bill validating device according to the present invention. The light emitting element 13 connected to the light source driving circuit 12 of the light emitting unit 1 ] 4 emits light toward the surface 5 of one banknote 14 . Of the light emitted from the light-emitting cord 13, the surface 1
The light uniformly reflected by the surface reflection light receiving element 17 of the light receiving section 16
It receives light and converts it into electricity No. 48. The light diffusely reflected on the surface 15 of the banknote 14 is transmitted to the diffusely reflected light receiving element 1 of the light receiving section 16.
The light is received at 8. The arrangement of the light emitting element 13, surface reflection light receiving element 17, and diffuse reflection light receiving element 18 is shown in FIG. That is, the light emitting element 13 is fixed at an angle θ to the surface 15 of the banknote 14, whereas the surface reflection light receiving element 17 is fixed at the same angle θ.
乱反射受光素子１８は、θとは異なる角度φで固定され
る。従って、面反射受光素子１７は１表面上５が理想的
な鏡面と仮定した場合の整反射又は鏡面反射による反射
光を受光する。しかし、乱反射受光素子１８は、表面１
５上で乱反射した反射光を受光する。The diffuse reflection light receiving element 18 is fixed at an angle φ different from θ. Therefore, the surface reflection light-receiving element 17 receives reflected light by regular reflection or specular reflection assuming that the surface 5 is an ideal mirror surface. However, the diffused reflection light receiving element 18
5 receives the reflected light that is diffusely reflected.
面反射受光素子１７及び乱反射受光素子１８で受光時に
発生する電気信号は、それぞれ増給器１９．２０で増幅
された後、アナログ−ディジタル変換器２１に送出され
、得られたディジタル信−号は、判定回路２２で比較さ
れる。判定回路２２での信号処理では１種々の比較が行
われるが、例えば、面反射受光素子１７及び乱反射受光
素子１８から得られる電気信号のディジタル値をそれぞ
れＰ及びＱとすると、ＰとＱとの差の絶対値Ｘ−１Ｐ−
Ｑ ｌを求め、紙幣１４の表面１５上の長さ方向の複数
部分においてＸが躯準範囲内に該当するか否かにより紙
幣の鑑別を行う。The electrical signals generated when light is received by the surface reflection light receiving element 17 and the diffuse reflection light receiving element 18 are amplified by amplifiers 19 and 20, respectively, and then sent to the analog-digital converter 21, and the obtained digital signals are , are compared by the determination circuit 22. Various comparisons are performed in the signal processing in the determination circuit 22. For example, if the digital values of the electric signals obtained from the surface reflection light receiving element 17 and the diffuse reflection light receiving element 18 are respectively P and Q, then the difference between P and Q is Absolute value of difference X-1P-
Q1 is determined, and the banknote is discriminated based on whether or not X falls within the standard range at multiple parts in the length direction on the front surface 15 of the banknote 14.
上記Ｘの値は、真紙幣では紙幣の長さ℃の方向に第３図
（ａ）に示すように、面反射受光索子１７からのアナロ
グ出力Ａ１と乱反射受光素子１８からのアナログ出力Ａ
２が得られる。これに対し７、カラー複写した変造紙幣
では、第３図（ｂ）で示すように、面反射受光素子１７
と乱反射受光素子１８とのアナログ出力は、それぞれＢ
工と８２で表される。（ａ）と（ｂ）とを比較すると、
面反射受光素子１７と乱反射受光素子１８のアナログ出
力レベルが逆となりかつ全体的な出力波形が大きく相違
し、非常に異なる光学特性を示す。第３図（ｃ）は１面
反射受光素子１７と乱反射受光素子１８のアナログ出力
の許容範囲を斜線で示する面反射受光素子１７と乱反射
受光素子１８とのアナログ信号を直接又はディジタル値
に変換して基準範囲内の許容値と比較すると、第４図に
示す結果が得られる。第４図で、Ａ、Ｂ及びＣは、それ
ぞれ真紙幣、カラー複写変造紙幣及び白黒複写変造紙幣
に関する基準値と比較した面反射割合と乱反射割合との
光学特性を示す。従って、この発明の光学式紙幣鑑別装
置では高精度の識別が可能であることが理解できよう。In the case of genuine banknotes, the value of
2 is obtained. On the other hand, in a color-copied altered banknote, as shown in FIG. 3(b), the surface reflection light receiving element 17
The analog outputs of the and diffuse reflection light-receiving element 18 are B, respectively.
It is represented by ENG and 82. Comparing (a) and (b),
The analog output levels of the surface reflection light-receiving element 17 and the diffuse reflection light-receiving element 18 are opposite, and the overall output waveforms are greatly different, exhibiting very different optical characteristics. FIG. 3(c) shows the permissible analog output ranges of the single-reflection light-receiving element 17 and the diffuse-reflection light-receiving element 18 with diagonal lines.The analog signals of the surface-reflection light-receiving element 17 and the diffuse-reflection light-receiving element 18 are directly or converted into digital values. When compared with the allowable value within the reference range, the results shown in FIG. 4 are obtained. In FIG. 4, A, B, and C indicate the optical characteristics of the surface reflection ratio and the diffuse reflection ratio, respectively, compared with reference values for genuine banknotes, color-copied altered banknotes, and black-and-white duplicated altered banknotes. Therefore, it can be understood that the optical banknote validator of the present invention enables highly accurate identification.
上記判定回路２２は、ディスクリート回路又はプログラ
ム制御式マイクロコンピュータで構成することができる
。ディスクリート回路で構成する場合は、例えば第５図
に示すように構成される。The determination circuit 22 can be constructed from a discrete circuit or a program-controlled microcomputer. When configured with discrete circuits, it is configured as shown in FIG. 5, for example.
アナログ−ディジタル変換器２１の出力は、判定回路２
２の記憶手段２３に供給される。記憶手段２３には、測
定位置検出手段２４からアドレス（８号が与えられる。The output of the analog-digital converter 21 is sent to the judgment circuit 2.
The data is supplied to the storage means 23 of No. 2. The storage means 23 is given an address (No. 8) from the measurement position detection means 24.
ホトカブラを構成する一対の発光ダイオード２５及び受
光トランジスタ２６は、この発明の光学式紙幣鑑別装置
への紙幣１４の挿入を検出して、トリガ信号を発生し、
このトリガ信号で紙幣１４を搬送するパルスモータ（図
示せず）を起動してパルス発生器２７を作動する。パル
ス発生器２７の出力は計数器２８で計数され、４（１定
位置検出手段２４は、この計数器２８の出力を分周して
測定位置信号をアドレス信号として記憶手段２３と他の
記憶手段３１に供給する。また。A pair of light emitting diodes 25 and a light receiving transistor 26 that constitute the photocoupler detect insertion of the banknote 14 into the optical banknote validator of the present invention and generate a trigger signal.
This trigger signal starts a pulse motor (not shown) for transporting banknotes 14 and activates the pulse generator 27. The output of the pulse generator 27 is counted by a counter 28, and the 4(1) fixed position detection means 24 divides the output of this counter 28 and uses the measured position signal as an address signal to store the measurement position signal in the storage means 23 and other storage means. Supply to 31.Also.
測定位置検出手段２４は、紙幣１４上の最終測定位置を
表すｎ番目の測定位置を決定するｎ検出手段２９にも測
定位置信号を供給する。The measurement position detection means 24 also supply a measurement position signal to the n detection means 29 which determines the nth measurement position representing the final measurement position on the banknote 14.
記憶手段２３で記憶された面反射受光素子１７及び乱反
射受光素子１８からのディジタル（Ｈ号は、演算手段３
０で差の絶対値Ｘ−＝ Ｉ Ｐ−Ｑ ＋が演算され、そ
の後、記憶手段３１で演算値が記憶される６最終の検出
位置に達したとき、ｎ検出手段２９が発生する出力で記
憶手段３１内に記憶された演算値は、例えば分数値を乗
することにより補正手段３２で補正される。ＲＯＭ （
リードオンリメモリ）等の固定的記憶手段３３には、絶
対値Ｘの基準範囲値が予め記憶されており、補正手段３
２の出力は、比較手段３４でこの基準範囲と比較される
。計数手段３５は、比較手段３４においてディジタル信
号が基準範囲に該当しないとき発生する出力数を計数す
る。検出手段３６は、計数手段３５の計数値が一定数以
下のとき紙幣受取の真偽判定出力ＯＫを発生し、上記一
定数を越えるとき紙幣拒絶の真偽判定出力ＮＧを発生す
る６オアゲー１〜；３７は、ｎ検出手段２９及びリセッ
トスイッチ３８の出力でリセット信号を発生し、計数器
２已にリセット＜’Ｅ＝号を印加すると共に、遅延手段
３９を通じて計数手段３５をリセットする。The digital data from the surface reflection light-receiving element 17 and the diffuse reflection light-receiving element 18 stored in the storage means 23 (H number is
0, the absolute value of the difference X-=I P-Q + is calculated, and then the calculated value is stored in the storage means 31. 6 When the final detection position is reached, the output generated by the n detection means 29 is stored. The calculated value stored in the means 31 is corrected by the correction means 32, for example by multiplying it by a fractional value. ROM (
A reference range value of the absolute value X is stored in advance in a fixed storage means 33 such as a read-only memory), and
The output of No. 2 is compared with this reference range by comparison means 34. The counting means 35 counts the number of outputs generated in the comparing means 34 when the digital signal does not fall within the reference range. The detection means 36 generates an output for determining authenticity of banknotes (OK) when the count value of the counting means 35 is below a certain number, and generates an output for determining authenticity (NG) for rejecting banknotes when it exceeds the above-mentioned certain number. 37 generates a reset signal from the output of the n detection means 29 and the reset switch 38, applies a reset <'E= signal to the counter 2, and resets the counting means 35 through the delay means 39.
第１図の回路の作動について説明する。紙幣１４を紙幣
鑑別装置に挿入すると、受光トランジスタ２６の信号で
紙幣搬送装置（図示せず）が起動され、パルス発生器２
７が紙幣１４の移動距離に同期してパルスを発生し、こ
のパルスを計数する計数器２８を通じて測定位置検出手
段２４が測定位置を表すアドレス信号を発生する。The operation of the circuit shown in FIG. 1 will be explained. When the banknote 14 is inserted into the banknote validating device, the banknote transport device (not shown) is activated by a signal from the light-receiving transistor 26, and the pulse generator 2
7 generates a pulse in synchronization with the moving distance of the banknote 14, and the measurement position detection means 24 generates an address signal representing the measurement position through a counter 28 that counts the pulse.
発光素子１３から照射される整反射光及び乱反射光はそ
れぞれ面反射受光素子１７及び乱反射受光素子１８で受
光され、それぞれ増幅器１９，２０及びアナログ−ディ
ジタル変換器２１を通じて測定位置検出手段２４のアド
レス信号で、記憶手段２３内に記憶される。面反射受光
素子１７と面皮゛射受光素子１８のディジタル信号は、
演算手段３０で差の絶対値として演算され、記憶手段３
１に記憶される。ｎ番目の測定位置のとき発生するｎ検
出手段２９の出力で、補正手段３２は、記憶手段３１の
演算値に定数を乗する補正を行い、補正値は、比較手段
３４で固定的記憶手段３３に記憶された基準範囲と比較
される。計数手段３５は。The regular reflection light and the diffuse reflection light emitted from the light emitting element 13 are received by the surface reflection light receiving element 17 and the diffuse reflection light receiving element 18, respectively, and are sent to an address signal of the measurement position detection means 24 through amplifiers 19, 20 and an analog-to-digital converter 21, respectively. and is stored in the storage means 23. The digital signals of the surface reflection light receiving element 17 and the surface reflection light receiving element 18 are as follows.
The calculation means 30 calculates the absolute value of the difference, and the storage means 3
1 is stored. The correction means 32 performs correction by multiplying the calculated value of the storage means 31 by a constant based on the output of the n detection means 29 generated at the nth measurement position, and the correction value is stored in the fixed storage means 33 by the comparison means 34. compared to a reference range stored in The counting means 35 is.
基準範囲に該当しない補正値の数を計数し、検出手段３
６は、非該当補正値が所定数以下のとき真紙幣と判断し
、所定数を越えるとき偽紙幣を判断する。Counting the number of correction values that do not fall within the reference range, detecting means 3
6, when the non-applicable correction value is less than a predetermined number, it is determined to be a genuine bill, and when it exceeds a predetermined number, it is determined to be a counterfeit bill.
第６図は、第５図に示す実施例のディジタル式判定回路
２２をアナログ式に変更した実施例を示す。比較手段と
しての差動増幅器４０は、増幅器１９と２０の出力を比
較し、その差に相当する出力を発生する。差ａ増幅器４
０の出力は、可変抵抗４１及びコンデンサ４２からなる
積分回路４３に供給され、レベル検出回路４４へ印加さ
れる。FIG. 6 shows an embodiment in which the digital determination circuit 22 of the embodiment shown in FIG. 5 is changed to an analog type. A differential amplifier 40 serving as a comparison means compares the outputs of the amplifiers 19 and 20 and generates an output corresponding to the difference. difference a amplifier 4
The output of 0 is supplied to an integrating circuit 43 consisting of a variable resistor 41 and a capacitor 42, and is applied to a level detection circuit 44.
可変抵抗４１は、抵抗４９と分圧器を構成する。The variable resistor 41 and the resistor 49 constitute a voltage divider.
レベル検出回路４４は、積分回路４３に接続されたベー
スを有する（−ランジスタ４５と、１−ランジスタ４５
のエミッタに接続された定電圧ダイオード４６と、トラ
ンジスタ４５のコレクタに接続されたベースを有するト
ランジスタ４７とを有する。The level detection circuit 44 has a base connected to the integrating circuit 43 (- transistor 45 and 1- transistor 45).
A constant voltage diode 46 is connected to the emitter of the transistor 45, and a transistor 47 has a base connected to the collector of the transistor 45.
トランジスタ４５のコレクタは、抵抗４８を通じて′６
Ｊ、源に接続される。１−ランジスタ４７のエミッタは
、抵抗（図示せず）を通じて電源に接続され、コレクタ
は、検出手段３６を構成するアンドゲート５０の入力端
子及びアンドゲート５１の反転入力端子に接続される。The collector of transistor 45 is connected to '6 through resistor 48.
J, connected to source. The emitter of the 1-transistor 47 is connected to a power supply through a resistor (not shown), and the collector is connected to an input terminal of an AND gate 50 and an inverting input terminal of an AND gate 51, which constitute the detection means 36.
アンドゲート５０と５１の他の入力端子は、ｎ検出手段
２９に接続される。The other input terminals of AND gates 50 and 51 are connected to n detection means 29.
第６図の回路では１面反射受光素子１７と乱反射受光素
子１８との出力差が大きいと、差動増幅器４０の出力が
大きくなり、トランジスタ４５及び４７がオンとなり、
アンドゲート５０は、ｎ検出手段２９が出力を発生する
とき偽紙幣の出力を発生する。しかし、Ｘ紙幣の場合は
、トランジスタ４５と４７は、オンとならず、アンドゲ
ート５１が出力を発生する。In the circuit shown in FIG. 6, when the difference in output between the single reflection light receiving element 17 and the diffuse reflection light receiving element 18 is large, the output of the differential amplifier 40 becomes large and transistors 45 and 47 are turned on.
The AND gate 50 generates an output of counterfeit banknotes when the n detection means 29 generates an output. However, in the case of banknote X, transistors 45 and 47 are not turned on, and AND gate 51 generates an output.
判定回路２２は、プログラム制御されろマイクロコンピ
ュータで構成することもできるが、この場合は、第７図
に示す手順でプロゲラ１１制御が行われる。即ち、紙幣
鑑別装置に紙幣が挿入されたとき、紙幣を検出しくステ
ップ６１）、紙幣を搬送するパルスモータ（図示せず）
をｙｊＡ’ＡＪする（ステップ６２）。パルスモータの
パルスを計数すると共に、紙幣の畏さ方向に面反射受光
素子１７と乱反射受光素子１８の４ｇ号Ｐ及びＱをサン
プリング（ステップ６３）Ｌ、、これらの差であるＸ＝
Ｉ Ｐ−Ｑ ＋を演算しくステップ６４）、その結果を
記憶する（ステップ６５）。Ｘ値をｎ個得た後（ステッ
プ６６）、定数を乗じてＸを補正（ステップ６７）し、
予め記憶させたＸの基準範囲とＸとを比較（ステップ６
８）して、この基準範囲外のｘ数を検出する（ステップ
６９）。基準範囲外のＸ数がｎ。個か否か判断（ステッ
プ７０）し、ｎｏ個以下のとき真紙幣と判断（ステップ
７１）するが＋ｎＱを越えるとき偽紙幣と判断する（ス
テップ７２）。The determination circuit 22 may be configured by a microcomputer under program control, but in this case, the progera 11 is controlled by the procedure shown in FIG. That is, when a banknote is inserted into the banknote validator, the banknote is detected (step 61), and a pulse motor (not shown) that conveys the banknote is activated.
yjA'AJ (step 62). While counting the pulses of the pulse motor, sample 4g P and Q of the surface reflection light receiving element 17 and the diffuse reflection light receiving element 18 in the direction of the banknote (step 63) L, and the difference between these is X=
Compute I P-Q + (step 64) and store the result (step 65). After obtaining n X values (step 66), correct X by multiplying by a constant (step 67),
Compare X with the reference range of X stored in advance (Step 6
8) and detect the number x outside this reference range (step 69). The number of X outside the standard range is n. If the number is less than or equal to no, it is determined that the banknote is genuine (step 71), but if it exceeds +nQ, it is determined to be a counterfeit banknote (step 72).
この発明の上記実施例は、変更が可能である。The above embodiments of the invention can be modified.
例えば、判定回路２２では、面反射受光素子１７と乱反
射受光素子１８とから得られろ信号の商又は二乗の差を
演算してもよい。For example, the determination circuit 22 may calculate the difference between the quotient or the square of the signals obtained from the surface reflection light receiving element 17 and the diffuse reflection light receiving element 18.
且肌ムカ米
この発明では１面反射受光素子から得られる電気信号と
乱反射受光素子から得られる電気信号とを比較し、新紙
幣鑑別方式により、紙幣表面の汚損に影響されずに、紙
幣の印刷状態を電気信号に変換して紙幣の真偽判定を行
うことができる。従って、複写による変造紙幣との相違
を明確に区別して精度の高い鑑別を行うことができる。This invention compares the electrical signals obtained from the single-sided reflection light-receiving element with the electrical signals obtained from the diffuse-reflection light-receiving element, and uses a new banknote discrimination method to print banknotes without being affected by dirt on the banknote surface. The authenticity of banknotes can be determined by converting the state into electrical signals. Therefore, it is possible to clearly distinguish the banknotes from those that have been altered by copying, and to perform highly accurate identification.
また、発光部に単光源を使用できるので、紙幣鑑別装置
の構造を簡素化することができる。Furthermore, since a single light source can be used for the light emitting section, the structure of the banknote validating device can be simplified.
第１図は、この発明による光学式紙ｍ鑑別’ｉｉの基本
的回路図、第２図は、この発明で使用する発光素子１面
反射受光素子及び乱反射受光素子の配置状態を示す斜視
図、第３図は、この発明の光学式紙幣鑑別装置において
面反射受光素子及び乱反射受光素子から得られるアナロ
グ出力を比較したグラフで、（ａ）及び（ｂ）は、それ
ぞれ真紙幣及び偽紙幣のアナログ出力のグラフ、（ｃ）
は、真紙幣と判断する基準範囲を示すアナログ出力のグ
ラフ、第４図は、真紙幣Ａ、カラー複写変造紙幣Ｂ及び
白黒複写変造紙幣Ｃの面反射割合と乱反射割合との光学
特性を示すグラフ、第５図は、第１図の回路の詳細を示
す回路図、第６図は、この発明の他の実施例を示す回路
図で、第７図は、マイクロコンピュータを使用してこの
発明を実施した場合の作動手順を表すフローチャートで
ある。
１１６８発光部、 １２０．光ｗＸｙｊＡ動回路、 １
３０６発光素子、 １４００紙幣、 １５００表面
、 １６０．受光部、 １７００面反射受光景子、 １
８１．乱反射受光素子、 １９．２０．。
増幅器、 ２１．、アナログ−ディジタル変換器。
２２００判定回路、
特許出願人 日本金銭機械株式会社
第１図
第２図
第３図
汀４図
乱反射割合
第７図FIG. 1 is a basic circuit diagram of the optical paper m discrimination 'ii according to the present invention, and FIG. 2 is a perspective view showing the arrangement of the light-emitting element, the one-sided reflection light-receiving element, and the diffuse reflection light-receiving element used in the invention. FIG. 3 is a graph comparing the analog outputs obtained from the surface reflection light-receiving element and the diffuse reflection light-receiving element in the optical banknote discrimination device of the present invention, and (a) and (b) are analog outputs of genuine banknotes and counterfeit banknotes, respectively. Graph of output, (c)
is a graph of analog output showing the reference range for determining a genuine banknote, and FIG. 4 is a graph showing the optical characteristics of the surface reflection ratio and the diffuse reflection ratio of the genuine banknote A, the color-copied and altered banknote B, and the black-and-white copy and altered banknote C. , FIG. 5 is a circuit diagram showing details of the circuit shown in FIG. 1, FIG. 6 is a circuit diagram showing another embodiment of the invention, and FIG. 7 is a circuit diagram showing another embodiment of the invention using a microcomputer. It is a flowchart showing the operating procedure when implemented. 1168 light emitting section, 120. Optical wXyjA dynamic circuit, 1
306 light emitting element, 1400 banknote, 1500 surface, 160. Light receiving part, 1700 surface reflection receiving element, 1
81. Diffuse reflection light receiving element, 19.20. . amplifier, 21. , analog-to-digital converter. 2200 Judgment Circuit, Patent Applicant: Japan Kinki Machinery Co., Ltd. Figure 1 Figure 2 Figure 3 Figure 4 Diffuse reflection ratio Figure 7
Claims (5)
で反射する光を受光して電気信号に変換する受光部と、
該受光部の出力を処理して紙幣の真偽判定出力を発生す
る判定回路とを有する光学式紙幣鑑別装置において、 前記発光部の発光素子から紙幣の表面に照射する光の照
射角度と等しい受光角度で配置されかつ紙幣の表面で整
反射した光を受光する面反射受光素子と、前記照射角度
とは異なる受光角度で配置されると共に前記発光素子か
ら照射されかつ前記紙幣の表面で乱反射した光を受光す
る乱反射受光素子とを前記受光部に設け、前記面反射受
光素子から得られる電気信号と乱反射受光素子から得ら
れる電気信号とを演算する演算手段と、該演算手段の出
力を予め記憶された基準範囲と比較して真偽判定出力を
発生する比較手段とを前記判定回路に設けたことを特徴
とする光学式紙幣鑑別装置。(1) a light emitting section; a light receiving section that receives light emitted from the light emitting section and reflected on the surface of the banknote and converts it into an electrical signal;
In an optical banknote validating device having a determination circuit that processes the output of the light receiving unit and generates an output for determining authenticity of the banknote, the light reception is equal to the irradiation angle of the light irradiated from the light emitting element of the light emitting unit onto the surface of the banknote. a surface-reflecting light-receiving element that is arranged at an angle and receives light regularly reflected on the surface of the banknote; and a surface-reflection light-receiving element that is arranged at a light-receiving angle different from the irradiation angle and that is emitted from the light-emitting element and diffusely reflected on the surface of the banknote. A diffused reflection light-receiving element for receiving light is provided in the light receiving section, a calculation means for calculating an electrical signal obtained from the surface reflection light-reception element and an electric signal obtained from the diffused reflection light-reception element, and an output of the calculation means is stored in advance. 1. An optical banknote discrimination device, characterized in that the determination circuit is provided with a comparison means for generating an output for determining authenticity by comparing the same with a reference range.
る電気信号と乱反射受光素子から得られる電気信号との
差を表す出力を発生する上記演算手段と、該演算手段の
出力を記憶する記憶手段と、該記憶手段に記憶された上
記差を表す出力を予め記憶された基準範囲と比較し、該
基準範囲に該当しない出力数を発生する比較手段と、該
比較手段の出力を計数する計数手段とを有する特許請求
の範囲第（１）項記載の光学式紙幣鑑別装置。(2) The determination circuit includes the arithmetic means that generates an output representing the difference between the electrical signal obtained from the surface reflection light receiving element and the electrical signal obtained from the diffuse reflection light receiving element, and a memory that stores the output of the arithmetic means. means, a comparison means for comparing the output representing the difference stored in the storage means with a reference range stored in advance and generating a number of outputs that do not fall within the reference range, and a counter for counting the output of the comparison means. An optical banknote validating device according to claim 1, comprising: means.
る電気信号と乱反射受光素子から得られる電気信号との
差を表す出力を発生する上記演算手段と、該演算手段の
出力を記憶する記憶手段と、該記憶手段に記憶された上
記差を表す出力に定数を乗じた補正値を得る補正手段と
、該補正手段の補正値を予め記憶された基準範囲と比較
し、該基準範囲に該当しない出力数を発生する比較手段
と、該比較手段の出力を計数する計数手段とを有する特
許請求の範囲第（１）項記載の光学式紙幣鑑別装置。(3) The determination circuit includes the arithmetic means for generating an output representing the difference between the electrical signal obtained from the surface reflection light-receiving element and the electrical signal obtained from the diffuse reflection light-receiving element, and a memory for storing the output of the arithmetic means. means, a correction means for obtaining a correction value obtained by multiplying the output representing the difference stored in the storage means by a constant, and comparing the correction value of the correction means with a reference range stored in advance, the correction value falling within the reference range. An optical banknote validator according to claim 1, comprising a comparison means for generating an output number that does not occur, and a counting means for counting the output of the comparison means.
る電気信号と乱反射受光素子から得られる電気信号との
レベル差を表す比較手段と、該比較手段の出力が所定レ
ベル以下であるか否かを検出するレベル検出回路とを有
する特許請求の範囲第（１）項記載の光学式紙幣鑑別装
置。(4) The determination circuit includes a comparison means for expressing a level difference between the electrical signal obtained from the surface reflection light receiving element and the electrical signal obtained from the diffuse reflection light receiving element, and a comparison means for determining whether the output of the comparison means is below a predetermined level. The optical banknote validating device according to claim 1, further comprising a level detection circuit for detecting whether or not a banknote is detected.
素子から得られる電気信号と乱反射受光素子から得られ
る電気信号との差を絶対値で表す出力を発生する特許請
求の範囲第（２）項又は第（３）項記載の光学式紙幣鑑
別装置。(5) The arithmetic circuit of the determination circuit generates an output representing the difference between the electrical signal obtained from the surface reflection light receiving element and the electrical signal obtained from the diffuse reflection light receiving element as an absolute value. ) or (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61119183A JPS62276685A (en) | 1986-05-26 | 1986-05-26 | Optical type paper money discriminator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61119183A JPS62276685A (en) | 1986-05-26 | 1986-05-26 | Optical type paper money discriminator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62276685A true JPS62276685A (en) | 1987-12-01 |
Family
ID=14754962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61119183A Pending JPS62276685A (en) | 1986-05-26 | 1986-05-26 | Optical type paper money discriminator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62276685A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016528501A (en) * | 2013-08-16 | 2016-09-15 | ブンデスドルッケライ・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング | Method and apparatus for verifying security elements of a security document |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5645982B2 (en) * | 1978-06-20 | 1981-10-30 |
-
1986
- 1986-05-26 JP JP61119183A patent/JPS62276685A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5645982B2 (en) * | 1978-06-20 | 1981-10-30 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016528501A (en) * | 2013-08-16 | 2016-09-15 | ブンデスドルッケライ・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング | Method and apparatus for verifying security elements of a security document |
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